Buggy code:
public class XSLTProcess extends MatchingTask implements XSLTLogger { private File destDir = null ; private File baseDir = null ; private String xslFile = null ; private String targetExtension = ".html" ; private Vector params = new Vector ( ) ; private File inFile = null ; private File outFile = null ; private String processor ; private Path classpath = null ; private XSLTLiaison liaison ; private boolean stylesheetLoaded = false ; private boolean force = false ; private FileUtils fileUtils ; private Vector outputProperties = new Vector ( ) ; private XMLCatalog xmlCatalog = new XMLCatalog ( ) ; private static final String TRAX_LIAISON_CLASS = "org.apache.tools.ant.taskdefs.optional.TraXLiaison" ; private static final String XSLP_LIAISON_CLASS = "org.apache.tools.ant.taskdefs.optional.XslpLiaison" ; private static final String XALAN_LIAISON_CLASS = "org.apache.tools.ant.taskdefs.optional.XalanLiaison" ; private boolean performDirectoryScan = true ; private XSLTProcess . Factory factory = null ; public XSLTProcess ( ) { } public void setScanIncludedDirectories ( boolean b ) { } public void execute ( ) throws BuildException { File savedBaseDir = baseDir ; DirectoryScanner scanner ; String [ ] list ; String [ ] dirs ; if ( ( xslFile ) == null ) { <START_BUG> throw new BuildException ( "no<seq2seq4repair_space>stylesheet<seq2seq4repair_space>specified" , location ) ; <END_BUG> } try { if ( ( baseDir ) == null ) { baseDir = getProject ( ) . resolveFile ( "." ) ; } liaison = getLiaison ( ) ; if ( ( liaison ) instanceof XSLTLoggerAware ) { ( ( XSLTLoggerAware ) ( liaison ) ) . setLogger ( this ) ; } log ( ( "Using<seq2seq4repair_space>" + ( liaison . getClass ( ) . toString ( ) ) ) , MSG_VERBOSE ) ; File stylesheet = getProject ( ) . resolveFile ( xslFile ) ; if ( ! ( stylesheet . exists ( ) ) ) { stylesheet = fileUtils . resolveFile ( baseDir , xslFile ) ; if ( stylesheet . exists ( ) ) { log ( ( "DEPRECATED<seq2seq4repair_space>-<seq2seq4repair_space>the<seq2seq4repair_space>style<seq2seq4repair_space>attribute<seq2seq4repair_space>should<seq2seq4repair_space>be<seq2seq4repair_space>relative<seq2seq4repair_space>" + "to<seq2seq4repair_space>the<seq2seq4repair_space>project\'s" ) ) ; log ( "<seq2seq4repair_space>basedir,<seq2seq4repair_space>not<seq2seq4repair_space>the<seq2seq4repair_space>tasks\'s<seq2seq4repair_space>basedir." ) ; } } if ( ( ( inFile ) != null ) && ( ( outFile ) != null ) ) { process ( inFile , outFile , stylesheet ) ; return ; } if ( ( destDir ) == null ) { String msg = "destdir<seq2seq4repair_space>attributes<seq2seq4repair_space>must<seq2seq4repair_space>be<seq2seq4repair_space>set!" ; throw new BuildException ( msg ) ; } scanner = getDirectoryScanner ( baseDir ) ; log ( ( "Transforming<seq2seq4repair_space>into<seq2seq4repair_space>" + ( destDir ) ) , MSG_INFO ) ; list = scanner . getIncludedFiles ( ) ; for ( int i = 0 ; i < ( list . length ) ; ++ i ) { process ( baseDir , list [ i ] , destDir , stylesheet ) ; } if ( performDirectoryScan ) { dirs = scanner . getIncludedDirectories ( ) ; for ( int j = 0 ; j < ( dirs . length ) ; ++ j ) { list = new File ( baseDir , dirs [ j ] ) . list ( ) ; for ( int i = 0 ; i < ( list . length ) ; ++ i ) { process ( baseDir , list [ i ] , destDir , stylesheet ) ; } } } } finally { liaison = null ; stylesheetLoaded = false ; baseDir = savedBaseDir ; } } public void setForce ( boolean force ) { } public void setBasedir ( File dir ) { } public void setDestdir ( File dir ) { } public void setExtension ( String name ) { } public void setStyle ( String xslFile ) { } public void setClasspath ( Path classpath ) { } public Path createClasspath ( ) { } public void setClasspathRef ( Reference r ) { } public void setProcessor ( String processor ) { } public void addConfiguredXMLCatalog ( XMLCatalog xmlCatalog ) { } private void resolveProcessor ( String proc ) throws Exception { } private Class loadClass ( String classname ) throws Exception { } public void setOut ( File outFile ) { } public void setIn ( File inFile ) { } private void process ( File baseDir , String xmlFile , File destDir , File stylesheet ) throws BuildException { } private void process ( File inFile , File outFile , File stylesheet ) throws BuildException { } private void ensureDirectoryFor ( File targetFile ) throws BuildException { } protected XSLTLiaison getLiaison ( ) { } public XSLTProcess . Param createParam ( ) { } public static class Param { private String name = null ; private String expression = null ; public void setName ( String name ) { } public void setExpression ( String expression ) { } public String getName ( ) throws BuildException { } public String getExpression ( ) throws BuildException { } } public XSLTProcess . OutputProperty createOutputProperty ( ) { } public static class OutputProperty { private String name ; private String value ; public String getName ( ) { } public void setName ( String name ) { } public String getValue ( ) { } public void setValue ( String value ) { } } public void init ( ) throws BuildException { } protected void configureLiaison ( File stylesheet ) throws BuildException { } protected void configureTraXLiaison ( TraXLiaison liaison ) { } public XSLTProcess . Factory createFactory ( ) throws BuildException { } public static class Factory { private String name ; private Vector attributes = new Vector ( ) ; public String getName ( ) { } public void setName ( String name ) { } public void addAttribute ( XSLTProcess . Factory . Attribute attr ) { } public Enumeration getAttributes ( ) { } public static class Attribute implements DynamicConfigurator { private String name ; private Object value ; public String getName ( ) { } public Object getValue ( ) { } public Object createDynamicElement ( String name ) throws BuildException { }

Fix:
throw new BuildException ( "no<seq2seq4repair_space>stylesheet<seq2seq4repair_space>specified" , getLocation ( ) ) ;